Manufacture of paper



Patented ct. 2, i931 ALEXANDER WILDMAN AND HOMER LATIMER, OF HAMILTON, OHIO, ASSIGNORS TO THE BEOKETT PAPER COMPANY, OF HAMILTON, OHIO, A CORPORATION OHIO MANUFACTURE O1 PAPER Application filed May 31, i929. Serial No. 367,548.

This invention relates to the manufacture of paper and more particularly to the manufacture of ornamentally colored paper.

One of the principal objects. of the invention is the provision of an improved method of formin an ornamentally colored sheet of paper, and apparatus for carrying out that method.

Another object is to provide for the effective application of coloring material to a forming web to produce an ornamentally colored sheet of paper of superior characteristics.

A further object is to provide for the irregular application of color in drops to a forming paper web.

Other objects and advantages of the invention will be apparent from the following description and from the accompanying drawings, in which- Fig. 1 is a diagrammatic showing of a color dropper embodying the present invention as applied to a paper making machine;

Fig. 2 is a top plan view of a color drop- P Fig. 3 is an enlarged section on the line 33 of Fig. 2; and

Fig. 4 is a front elevation of a' portion of the color dropper mechanism.

Referring more particularly to the drawings, in which is illustrated, somewhat diagrammatically, a preferred embodiment of the invention, and in which corresponding numerals designate like parts in the various views, the numeral 10 designates the breast roll of the Fourdrinier part of a pa r making machine. The forming wire is indicated at 11 and conventional slices at 12. Of course any of the usual means for flowing the stock on to the wire may be used. Table rolls and suction boxes are conventionally illustrated at 13 and 14 respectively. Stock of suitable character is flowed onto the wire and the paper web formed therefrom in usual manner, much of the water of the stock escaping in the zone adjacent the slices, which zone, for convenience is referred to as the forming zone. Coloring material is applied in a controlled manner by means of color droppers designated generally by the numeral 15, which are adjustably positioned to direct the coloring matter at the desired place and time in the sheet forming cycle. The color droppers may be adjustably supported in any suitable manner; the supporting means being shown diagrammatically at 16, and arranged to permit either vertical or horizontal adjustment. The effective positioning of the color droppers, for any given relative spacing and rate of feed of the droppers, with respect to the point so at which the stock flows .onto the forming wire determines the amounts and character of spread of the coloring matter on or throughout the forming sheet. As shown the color droppers are positioned after the slices,

and generally in position to give an irregular or mottled color effect to the finished paper.

One or more color droppers may be used according to results desired, each of the color droppers comprising a tank 20 extending transversely across the paper machine, adjustably supported as stated above, and of sutficient depth to hold a suitable working quantity of coloring material, such as a solution of anilin or pigment dyestufl. A roll 21 is rotatably supported above the tank by means of bearings 23 which are suitably supported on the end walls of the tank. Each roll is connected through a gear drive 27 to a driving motor 28. Power is supplied to so each of the motors through wires 29 each motor circuit having therein a rheostat 30 by which the speed of each motor and the rate of rotation of its roll may be independently varied. The roll is positioned so as to be brackets 25 to the side wall 26 of the tank and are angularly placed so that the upper end, which is in contact with the color pick up roll, will collect or scrape 01f the coloring materials adhering to the roll surface as the roll is rotated in the direction of the arrow of Fig. 3. The coloring material scraped As shown this is accom- 90 from the rotating roll surface flows by gravity down the slanting surface of the doctors, onto the vertically hanging members 31 which are suspended in color receiving position with respect to the doctors. These members 31 are preferably strips of cloth which become saturated with the color solution and feed it downwardly with a substantially regular rate of flow. Carried at the lower end of each strip 31 is a collecting or drop forming member 32, which, in effect serve as temporary reservoirs to permit the collection of coloring fluid so that it may be intermittently released as drops of considerable size,'on to the paper forming web. The strips 31 are of such length as to support the enlargements 32 close to the forming wire, which prevents surface injury or other damage to the forming sheet due to the impingement of the drops thereon. The strips and drop formers may be spaced variable distances apart, to secure *any desired relative color spread, and the fabric strips and drop formers together make for desirable controlled release of drops of color upon the forming sheet so that nice regulation or control of the color spread may be secured and coordinated with the speed of travel of the forming sheet and the time element in web formation, so that wide variations in color formation and control may be secured. .-The more fluid the condition of the stock at the place or zone of application of the colorthe more uniform and regular its speed. If applied between the slices, or before the stock flows on to the wire, for example, it will be uniformly disseminated through the stock to impart a uniform and regular color to the paper. If positioned suitably within the forming zone, the colors may be caused to assume waves, so to speak, of variable color and intensity. That is the colors may be caused to flow and blend into each other to give somewhat of a rainbow effect. If applied later in the time cycle of web formation it may be caused to form an irregular or marbleized sort of effect. And by properly spacing the drop formers with respect to each other and properly controlling the rate of feed of the coloring material from the color pick up rolls, a wide, but controllable, variety of color effects may be secured.

Further when a plurality of color droppers are used difierent colors may be supplied to each tank and the coloring efiect may be additionally varied by controlling the relative speed of the rolls, as well as by the relative positioning of the color droppers.

While the method herein described, and the form of apparatus for carrying this method into effect, constitute preferred embodiments of the invention, it is to be understood that the invention is not limited to this precise method and form of apparatus, and that changes may be made in either without departing from the scope of the invention which is defined in the appended claims.

What is claimed 1s:

1. Means for use in the formation of colored paper comprising a color container, drop formers, and means for feeding color from said container to said drop formers at a controlled rate, said feeding means comprising spaced fabric webs.

2. Means for use in the formation of colored paper comprising a color-container, a color dropper, and means for feeding coloring material at irregular intervals onto a traveling" paper web within the zone of its formation, said means including a pick up roll and a doctor.

3. Means for use in the formation of colored paper comprising a color container a color dropper, a rotatable pick' up roll for withdrawing coloring-material from said container, means for rotating said roll and means for feeding sucli withdrawn color in large drops and at irregular intervals onto a traveling paper web.

4. Means for use in the formation of colored paper comprising a color container, a color dropper, a rotatable pick up roll for withdrawing coloring material from said container, means for rotating said roll, and means for feeding such removed color in large drops and at irregular intervals onto a travelingpaper web, said feeding means comprising a doctor and a temporary reservoir positioned abovea traveling paper web within the forming zone.

5. Means for use in the formation of colored paper comprising a color container a color dropper, a rotatable pick u roll'for withdrawing coloring material rom said container, means forrotating said roll, and a plurality of doctors contacting with said roll.

6. Means for use in the formation of colored paper comprising a color container, a color dropper, a rotatable pick up roll for continuously withdrawing coloring material from the said container, means for rotating said roll, a plurality of doctors contacting with said roll, temporary collectors attached to said doctors to receive color therefrom and positioned above the .forming zone of a traveling pa er web. v

7. Means or use in the formation of colored paper comprising a color container, a color dropper, a rotatable pick up roll for continuously withdrawing coloring material from said container, means for rotatin said roll, a doctor supported by said tank and contacting with said roll, a fabric member attached to said doctor, a drop forming member attached to said fabric member at the lower end thereof and positioned above the forming zone of a traveling paper web.

8. Means for use in the formation of colored paper comprising a color container, a

color dropper, a rotatable pick u roll for continuously withdrawing color an material from said container, means for rotating. said roll, a plurality of doctors contacting with said roll, fabric members attached to' said doctors and drop forming members attached to said fabric members at the lower end thereof.

9. Means for use in the formation of colored paper, comprising a plurality of color contalning tanks, a color dropper, a rotatable pick up roll positioned within each of said tanks for continuously withdrawing coloring material therefrom, means for rotating the several rolls, said means providing for the rotation of each roll at a determined speed, and doctors contacting with said rolls.

10. Means for use in the formation of colored paper, comprising a plurality of color containing tanks, a color dropper, a rotatable pick up roll positioned within each of said tanks for continuously withdrawing coloring material therefrom, means for rotating each of the rolls independently, feeding means comprising doctors contacting with said rolls and adapted to receive color therefrom, temporary reservoirs comprising fabric members attached to said doctors and drop forming members attached to said fabric members.

11. The method in the making of ornamental paper which comprises flowing pulp stock onto a paper forming member, collecting successive large drops of coloring material at a non-destructive dropping distancefrom the surface of the forming sheet of paper and applying said drops at irregular intervals to said forming sheet of paper.

12. The method, in the manufacture of ornamental paper which comprises flowing pulp onto a'paper forming wire, and feeding coloring material onto the web in controlled quantity and at a predetermined time zone in the cycle of web formation controlled with respect to the degree of web formation attained to effect desired controlled spread of the coloring material. v

13. Means for use in the formation of colored paper, comprising a plurality of color containing tanks, drop forming mechanism, color pick-up means for each of said tanks, and means for feeding color from said pickup means to said drop forming mechanism at a rate for each tank controlled with respect to each said tank.

In testimony whereof we hereto afiix our signatures.

ALEXANDER J. WILDMAN. HOMER H. LATIMIER. 

